The Following Questions Refer to the Description and Table 28

question 48

Multiple Choice

The following questions refer to the description and Table 28.1 below.
Diatoms are encased in Petri-plate-like cases (valves) made of translucent hydrated silica whose thickness can be varied. The material used to store excess calories can also be varied. At certain times, diatoms store excess calories in the form of the liquid polysaccharide, laminarin, and at other times, as oil. Below are data concerning the density (specific gravity) of various components of diatoms, and of their environment.
Table 28.1: Specific Gravities of Materials Relevant to Diatoms
$$\begin{array} { l l } \text { Material } & \text { Specific Gravity } ( \mathrm { kg } / / \mathrm { m }^{3} ) \\\text { Pure water } & 1000 \\\text { Seawater } & 1026 \\\text { Hydrated silica } & 2250 \\\text { Liquid laminarin } & 1500 \\\text { Diatom oil } & 910\end{array}$$
-The chloroplasts of land plants are thought to have been derived according to which evolutionary sequence?

• A)cyanobacteria ? green algae ? land plants
• B)cyanobacteria ? green algae ? fungi ? land plants
• C)red algae ? brown algae ? green algae ? land plants
• D)red algae ? cyanobacteria ? land plants
• E)cyanobacteria ? red algae ? green algae ? land plants

Understand the stages of sleep and their implications for health and psychological well-being.

Analyze theories of dreaming and their contributions to our understanding of the cognitive and emotional significance of dreams.

Examine the impact of sleep deprivation on cognitive performance and decision-making.

Understand the factors that contribute to cultural change.

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Definitions:

Laceration

A deep cut or tear in skin or flesh, often resulting from an accident or injury.

Tetanus Antitoxin

An injection used to prevent or treat tetanus by neutralizing the toxins produced by Clostridium tetani bacteria.

Right Forearm

The lower part of the right arm between the elbow and the wrist.

Dehiscence

The reopening of a wound along a surgical incision or a traumatic injury site, often due to incomplete healing.